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Responsive Columns in JavaScript Gantt control

08 Dec 2022 / 3 minutes to read

You can toggle the column visibility based on media queries, which are defined in the hideAtMedia. The hideAtMedia accepts valid Media Queries.

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index.ts
index.html
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import { Gantt } from '@syncfusion/ej2-gantt';
import { GanttData } from 'datasource.ts';

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    splitterSettings: {
        position: '75%'
    },
    height: '450px',
    columns: [
        { field: 'TaskID', headerText: 'Task ID', textAlign: 'Left', width: '100' },
        { field: 'TaskName', headerText: 'Task Name', width: '200', hideAtMedia: '(min-width: 700px)' },
        { field: 'StartDate', headerText: 'Start Date', width: '150' },
        { field: 'Duration', headerText: 'Duration', width: '100', hideAtMedia: '(max-width: 500px)' },
        { field: 'Progress', headerText: 'Progress', width: '150' }
    ]

});
gantt.appendTo('#Gantt');
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<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/20.3.56/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>


<body>
    
    <div id='loader'>Loading....</div>
    <div id="container">
        <div id="Gantt"></div>        
    </div>
</body></html>

Change tree/expander column

The tree/expander column is a column in the Gantt control, that has icons to expand or collapse the parent records. You can define the tree column index in the Gantt control by using the treeColumnIndex property and the default value of this property is 0. The following code example shows how to use this property.

Source
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index.ts
index.html
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import { Gantt } from '@syncfusion/ej2-gantt';
import { GanttData } from 'datasource.ts';

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    splitterSettings: {
        columnIndex: 3
    },
    height: '450px',
    treeColumnIndex: 2
});
gantt.appendTo('#Gantt');
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<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/20.3.56/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>


<body>
    
    <div id='loader'>Loading....</div>
    <div id="container">
        <div id="Gantt"></div>        
    </div>
</body></html>

Show or Hide columns dynamically

You can show or hide gantt columns dynamically using external buttons by invoking the showColumn or hideColumn method.

Source
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index.ts
index.html
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import { Gantt, Edit, Selection } from '@syncfusion/ej2-gantt';
import { Button } from '@syncfusion/ej2-buttons';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Edit, Selection);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    splitterSettings: {
        position: '75%'
    },
    editSettings: {
        allowEditing: true
    },
    height: '450px',
    columns: [
        { field: 'TaskID', headerText: 'Task ID' },
        { field: 'Progress', headerText: 'Progress' },
        { field: 'TaskName', headerText: 'Task Name' },
        { field: 'StartDate', headerText: 'Start Date' },
        { field: 'Duration', headerText: 'Duration' }
    ]
});
gantt.appendTo('#Gantt');
let show: Button = new Button();
show.appendTo('#show');
let hide: Button = new Button();
hide.appendTo('#hide');
document.getElementById('show').addEventListener('click', () => {
   gantt.showColumn(['TaskName', 'Duration']);
});
document.getElementById('hide').addEventListener('click', () => {
   gantt.hideColumn(['TaskName', 'Duration']);
});
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<!DOCTYPE html>
<html lang="en">

<head>
     <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/20.3.56/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
       
     <div id='loader'>Loading....</div>
    <div id='container'>
	   <button id="show">Show</button>
       <button id="hide">Hide</button>
        <div id='Gantt'></div>
    </div>
</body>

</html>